74⋅83⋅(71)4=?
We use the formula:
(ba)n=bnan
We decompose the fraction inside of the parentheses:
(71)4=7414
We obtain:
74×83×7414
We simplify the powers: 74
We obtain:
83×14
Remember that the number 1 in any power is equal to 1, thus we obtain:
83×1=83